Consequences of recurrent anal fistulas

Written by Yang Dong

Colorectal Surgery Department

Updated on September 03, 2024

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If an anal fistula is not treated in time, it may repeatedly occur. If an anal fistula repeatedly occurs, due to local inflammation, pus will spread and infiltrate into the perianal tissues, causing further aggravation of infection. This can then affect the function of the anus, potentially leading to symptoms such as fecal incontinence. Moreover, if an anal fistula repeatedly occurs over a long period, there is a possibility of malignant transformation.

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Written by Chen Tian Jing

Colorectal Surgery

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How long will it take for a fallen anal fistula seton to heal?

The primary surgical method for anal fistulas is the fistulotomy with seton placement. The duration for which the seton, made of elastic band, remains in place largely depends on the severity of the anal fistula and the amount of sphincter muscle tied. If the fistula is a simple superficial one, the seton usually falls out around seven days. In cases of high, complex anal fistulas, or those with multiple branching fistula tracts and multiple sphincters tied, the seton may take slightly longer to fall out, generally about ten days. If the seton has not fallen out after the local sphincter muscle has fully regenerated, it can be cut by a professional proctologist. However, it is important to note that postoperative care mainly involves dressing changes until the seton falls out, indicating that the wound has largely healed.

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Written by Yang Dong

Colorectal Surgery Department

29sec

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What color is the pus from an anal fistula?

An anal fistula is a sinus tract and fistula formed from an infection of the anal sinuses and glands. During the infection phase, there is a possibility of swelling, pain, and pus discharge. This discharge may be yellow pus or pus mixed with blood. Regardless of the color, it is crucial to seek prompt medical treatment at a hospital and undergo thorough treatment, rather than attempting conservative treatment on one's own.

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Written by Chen Tian Jing

Colorectal Surgery

52sec

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Can an anal fistula be left untreated for a lifetime?

If diagnosed with an anal fistula, one should not forego treatment indefinitely, as an anal fistula is a localized infectious disease of the anal region. Without active treatment, the infection may further spread, increase the number of fistula branches, and potentially induce a high, complex anal fistula. There is also a risk that the fistula and the infection might penetrate the local anal sphincter, reaching the ischioanal fossa and causing other infectious diseases. The primary treatment method for anal fistulas is surgical, mainly involving fistulotomy with seton placement, which thoroughly removes the local infection, allowing the anal fistula to heal. Neglecting active treatment could worsen the condition or increase the difficulty of future surgeries.

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Written by Yu Xu Chao

Colorectal Surgery

1min 17sec

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How to determine if you have an anal fistula

First, you can judge whether you have an anal fistula based on symptoms. Patients with anal fistula often experience recurrent perianal swelling and pain, as well as discharge of pus and blood, which may also have a foul odor, with secretion often found on their underwear. In such cases, patients should consider whether they have an anal fistula. Additionally, patients with anal fistulas in the early stages often have perianal abscesses, which generally tend to form fistulas after the abscess ruptures spontaneously or is surgically drained. Patients can also visit the colorectal surgery department of a hospital for a digital rectal examination, where the fistula tract and the internal opening can be felt. MRI scans of the perianal region can also be performed to determine the type and severity of the anal fistula. Clinically, once an anal fistula is detected, it is advisable to opt for fistula excision surgery to completely cure the anal fistula by removing the internal opening and the fistula tract. Post-surgery, it is essential to persist with dressing changes to avoid wound infection and bleeding.

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Written by Chen Tian Jing

Colorectal Surgery

1min 1sec

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Anal fistulas secondary to which disease?

An anal fistula generally originates from a perianal abscess, which is an infection focus formed near the anal sinuses in the local area of the anus. During its onset, there is obvious local redness, swelling, heat, and pain accompanied by the formation of a pus cavity containing pus. As the condition of the perianal abscess worsens, the local pus cavity will rupture and discharge pus, thus forming an anal fistula. After the rupture of a perianal abscess, its external opening cannot heal by itself, and there will be intermittent recurring discharge of pus. Therefore, it is necessary to carry out surgical treatment as soon as possible after the formation of an anal fistula, to prevent the enlargement of the local pus cavity or thickening of the fistula wall, which complicates later surgery and treatment and significantly impacts the patient's normal life.